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Plant protein power: new study tests weight loss in seniors

NCT ID NCT07429136

Disease control Sponsor: Amsterdam University of Applied Sciences Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study tests whether adults aged 55 and older with obesity can follow a plant-based, high-protein diet while losing weight. Two hundred participants will receive dietary counseling for six months, focusing on cutting 500 calories per day and increasing protein intake. Half will aim for at least 60% of their protein from plants, the other half from animals. Researchers will measure weight loss, muscle mass, and overall health.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
dietary counseling for a plant-based, high-protein, calorie-restricted diet
What this could lead to
If successful, this could show that a plant-based high-protein diet is a feasible way for older adults to lose weight while preserving muscle mass.
What could go wrong
This is an early feasibility study, not a large trial testing long-term health outcomes. Results may not apply to all older adults, and sticking to the diet may be challenging.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

About 200 people

The number the study aims to enrol. It can still change while the study runs.

Started

Aug 2024

Expected to finish

Apr 2027

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

55 years and older

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Aged 55 or older * Are obese: have a BMI of \>30 kg/m2 or BMI \>27 kg/m2 and waist circumference \>88 cm (women) or \>102 cm (men) * Living independently (not in a health facility) * The willingness that the general practitioner will be notified of study participation * Written informed consent * Willingness to comply with the protocol * Consent of the study physician Exclusion Criteria: * Inability to understand the Dutch language * Cognitive impairment (MMSE \<15) * Use of total or partial parenteral nutrition (TPN) * Alcohol or drug abuse in the opinion of the investigator * Current enrolment in a fixed rehabilitation program or other intervention studies * Palliative treatment or a life expectancy of ≤ 3 months * Following a vegetarian or vegan (100% plant-based) diet * Bariatric surgery * Active medical treatment interfering with this intervention (e.g. weight loss medication as Ozempic, cancer patients receiving systemic and immune therapy) * Physical disabled: unable to meet the general daily exercise guideline for adults * Planned a holiday during the intervention period and is unable to attend group- or individual sessions for \> 3 weeks The health conditions below will be assessed by the study physician. When a condition interferes the dietary treatment or if the diet worsens the participants health it counts as exclusion criteria: * Diagnosed with unstable coronary heart disease (CHD), decompensated heart failure, uncontrolled hypertension or uncontrolled arrhythmias (e.g. heart failure NYHA \>3) * Diagnosed degenerative neurocognitive disorders * Diagnosed with renal failure * COPD GOLD \>3

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Conditions

The condition(s) this trial relates to.

Obesity obesity disorder

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Obesity

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • Hogeschool van Amsterdam

    RECRUITING

    Amsterdam, South Holland, 1067SM, Netherlands

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